Biography:

Once nothing but a petty thief, he was caught by the guards of Qeynos.  Instead of being sentenced to death, as was the norm for thieves, he was granted a reprieve, and sentenced to survive Blackburrow.  He was guided there on a long trip by a Monk named Azuka, who taught Azrael many things about unarmed combat on the way, but was killed just upon entering.  Confronted by many gnolls, he gave up life until a Ranger named Gaelder and his wife Mileena showed up, rescuing him and killing the gnolls.  He lived with them for a long time until giving up life in the forest, returning to Qeynos 4 years older and hoping they would not recognize him.  Upon arriving, he met a young thief girl who was living on the streets, and who also reminded him of his own past. From that day, he founded the Association of Rogues, a society based in aiding the thieves in Qeynos, moving on to let in thieves from the world join, while standing beside him was the girl he met in the streets, Monika.  The guild grew and grew, until the ranger he had lived with and seen as a father returned to the city, saying his wife Mileena had died.  With nowhere else to go, and Azrael realizing he was a strong person with a good head on his shoulders, Azrael relinquished command of the guild to Gaelder, and assumed the rank of shadowcloak.

Other Comments:

Don't judge a book by its cover.
Azrael is the opposite of everything he lets on (and he does it on purpose).
Resourceful. Azrael has a general contempt for society, and has his own static views on how the world should be.